This edge release moves Linkerd's bundled Prometheus into an add-on. This makes the Linkerd Prometheus more configurable, gives it a separate upgrade lifecycle from the rest of the control plane, and will allow users to disable the bundled Prometheus instance. In addition, this release includes fixes for several issues, including a regression where the proxy would fail to report OpenCensus spans. * Prometheus is now an optional add-on, enabled by default * Custom tolerations can now be specified for control plane resources when installing with Helm (thanks @DesmondH0!) * Evicted data plane pods are no longer considered to be failed by `linkerd check --proxy`, fixing an issue where the check would be retried indefinitely as long as evicted pods are present * Fixed a regression where proxy spans were not reported to OpenCensus * Fixed a bug where the proxy injector would fail to render skipped port lists when installed with Helm * Internal improvements to the proxy for lower latencies under high concurrency * Thanks to @Hellcatlk and @surajssd for adding new unit tests and spelling fixes!